Sec.  15.118   Cable ready consumer electronics equipment.

   

   (a) All consumer electronics TV receiving equipment marketed in the
   United States as cable ready or cable compatible shall comply with the
   provisions of this section. Consumer electronics TV receiving
   equipment that includes features intended for use with cable service
   but does not fully comply with the provisions of this section are
   subject to the labelling requirements of Sec. 15.19(d). Until such time as
   generally accepted testing standards are developed, paragraphs (c) and
   (d) of this section will apply only to the analog portion of covered
   consumer electronics TV receiving equipment

   (b) Cable ready consumer electronics equipment shall be capable of
   receiving all NTSC or similar video channels on channels 1 through 125
   of the channel allocation plan set forth in CEA-542-B: "CEA Standard:
   Cable Television Channel Identification Plan," (incorporated by
   reference, see Sec. 15.38).

   (c) Cable ready consumer electronics equipment must meet the following
   technical performance requirements. Compliance with these requirements
   shall be determined by performing measurements at the unfiltered IF
   output port. Where appropriate, the Commission will consider allowing
   alternative measurement methods.

   (1) Adjacent channel interference. In the presence of a lower adjacent
   channel CW signal that is 1.5 MHz below the desired visual carrier in
   frequency and 10 dB below the desired visual carrier in amplitude,
   spurious signals within the IF passband shall be attenuated at least
   55 dB below the visual carrier of the desired signal. The desired
   input signal shall be an NTSC visual carrier modulated with a 10 IRE
   flat field with color burst and the aural carrier which is 10 dB below
   the visual carrier should be unmodulated. Measurements are to be
   performed for input signal levels of 0 dBmV and +15 dBmV, with the
   receiver tuned to ten evenly spaced EIA IS-132 channels covering the
   band 54 MHz to 804 MHz.

   (2) Image channel interference. Image channel interference within the
   IF passband shall be attenuated below the visual carrier of the
   desired channel by at least 60 dB from 54 MHz to 714 MHz and 50 dB
   from 714 MHz to 804 MHz. The 60 dB standard applies at 714 MHz. In
   testing for compliance with this standard, the desired input signal is
   to be an NTSC signal on which the visual carrier is modulated with a
   10 IRE flat field with color burst and the aural carrier is
   unmodulated and 10 dB below the visual carrier. The undesired test
   signal shall be a CW signal equal in amplitude to the desired visual
   carrier and located 90 MHz above the visual carrier frequency of the
   desired channel. Measurements shall be performed for input signals of
   0 dBmV and +15 dBmV, with the receiver tuned to at least ten evenly
   spaced EIA IS-132 channels covering the band 54 MHz to 804 MHz.

   (3) Direct pickup interference. The direct pickup (DPU) of a
   co-channel interfering ambient field by a cable ready device shall not
   exceed the following criteria. The ratio of the desired to undesired
   signal levels at the IF passband on each channel shall be at least 45
   dB. The average ratio over the six channels shall be at least 50 dB.
   The desired input signal shall be an NTSC signal having a visual
   carrier level of 0 dBmV. The visual carrier is modulated with a 10 IRE
   flat field with color burst, visual to aural carrier ratio of 10 dB,
   aural carrier unmodulated. The equipment under test (EUT) shall be
   placed on a rotatable table that is one meter in height. Any excess
   length of the power cord and other connecting leads shall be coiled on
   the floor under the table. The EUT shall be immersed in a horizontally
   polarized uniform CW field of 100 mV/m at a frequency 2.55 MHz above
   the visual carrier of the EUT tuned channel. Measurements shall be
   made with the EUT tuned to six EIA IS-132 channels, two each in the
   low VHF, high VHF and UHF broadcast bands. On each channel, the levels
   at the IF passband due to the desired and interfering signals are to
   be measured.

   (4) Tuner overload. Spurious signals within the IF passband shall be
   attenuated at least 55 dB below the visual carrier of the desired
   channel using a comb-like spectrum input with each visual carrier
   signal individually set at +15 dBmV from 54 to 550 MHz. The desired
   input signal is to be an NTSC signal on which the visual carrier is
   modulated with a 10 IRE flat field with color burst and the aural
   carrier is unmodulated and 10 dB below the visual carrier.
   Measurements shall be made with the receiver tuned to at least seven
   evenly spaced EIA IS-132 channels covering the band 54 MHz to 550 MHz.
   In addition, spurious signals within the IF passband shall be
   attenuated at least 51 dB below the visual carrier of the desired
   channel using a comb spectrum input with each signal individually set
   at +15 dBmV from 550 to 804 MHz. Measurements shall be made with the
   receiver tuned to at least three evenly spaced EIA IS-132 channels
   covering the band 550 MHz to 804 MHz.

   (5) Cable input conducted emissions. (i) Conducted spurious emissions
   that appear at the cable input to the device must meet the following
   criteria. The input shall be an NTSC video carrier modulated with a 10
   IRE flat field with color burst at a level of 0 dBmV and with a visual
   to aural ratio of 10 dB. The aural carrier shall be unmodulated. The
   peak level of the spurious signals will be measured using a spectrum
   analyzer connected by a directional coupler to the cable input of the
   equipment under test. Spurious signal levels must not exceed the
   limits in the following table:

   From 54 MHz up to and including 300 MHz-26 dBmV

   From 300 MHz up to and including 450 MHz-20 dBmV

   From 450 MHz up to and including 804 MHz-15 dBmV

   (ii) The average of the measurements on multiple channels from 450 MHz
   up to and including 804 MHz shall be no greater than -20 dBmV.
   Measurements shall be made with the receiver tuned to at least four
   EIA IS-132 channels in each of the above bands. The test channels are
   to be evenly distributed across each of the bands. Measurements for
   conducted emissions caused by sources internal to the device are to be
   made in a shielded room. Measurements for conducted emissions caused
   by external signal sources shall be made in an ambient RF field whose
   field strength is 100 mV/m, following the same test conditions as
   described in paragraph (c)(3) of this section.

   (d) The field strength of radiated emissions from cable ready consumer
   electronics equipment shall not exceed the limits in Sec. 15.109(a) when
   measured in accordance with the applicable procedures specified in
   Sec. Sec. 15.31 and 15.35 for unintentional radiators, with the following
   modifications. During testing the NTSC input signal level is to be +15
   dBmV, with a visual to aural ratio of 10 dB. The visual carrier is to
   be modulated by a 10 IRE flat field with color burst; the aural
   carrier is to be unmodulated. Measurements are to be taken on six EIA
   IS-132 channels evenly spaced across the required RF input range of
   the equipment under test.

   Note: The provisions of paragraphs (a) through (d) of this section are
   applicable as of June 30, 1997.

   [ 59 FR 25341 , May 16, 1994, as amended at  61 FR 18509 , Apr. 26, 1996;
    65 FR 64391 , Oct. 27, 2000;  68 FR 68546 , Dec. 9, 2003;  69 FR 2849 ,
   Jan. 21, 2004;  69 FR 57861 , Sept. 28, 2004]